Synthesis and characterization of some new cationic surfactants as additives to nanocomposites for improvement of some properties of drinking water pipes

Abstract

In the present study, 1- A different types of surfactants were synthesized A. Cationic thiol surfactants were synthesized: 1- Thiol surfactants (1-decane,1-dodeane and 1- hexadecane) -2-mercapto pyridine bromide (I,II and III) were synthesized via reaction of 2-mercaptopyridine and a mixture of alkyl halides with different alkyl chain lengths (1-bromo decane, 1- bromo dodecane and 1- bromo hexadecane) respectively . 2- Thiol surfactants (1-ocane,1-decane and1-dodecane) -4-mercapto pyridine bromide (IV,VandVI) were synthesized via reaction of 4-mercaptopyridine and a mixture of alkyl halides with different alkyl chain lengths (1-bromo octane,1- bromo decane and 1- bromo dodecane) respectively. B. Amphoteric surfactant 4-(((1-dodecylpyridine bromide)-4-yl) methylene) amino) sodium benzoate (VII) and di-cationic surfactant 1-dodecyl-4-(((1-dodecylpyridine-4-yl)imino)methyl)pyridine bromide (VIII) were synthesized in two steps: - The first step, a mixture of 4-nicotine aldehyde and sodium 4-amino benzoate was refluxed with 4-amino pyridine. - The second step, the products prepared in the first step were refluxed with (1-bromododecane). Then the structures of the prepared surfactants were inferred from spectral data (FTIR,1HNMR and Mass spectrum). ii